Klondex Announces New Open Pit Mineral Resource Estimate at Fire Creek; Total Indicated of 1.1M AuEq Oz and Inferred of 1.1M AuEq Oz - Seite 2

In 2017, a total of 21 surface and 10 underground core drill holes were drilled for a total of 14,758 ft (4,498 m). This drilling targeted wide zones of low grade mineralization above the high grade vein system currently in production, with the intent to develop a bulk minable resource. Also included in these new resources is historical drilling conducted since 2004, which consists of 1,474 surface and underground drill holes totaling 1,022,240 ft (311,578 m).

A technical report in support of the Mineral Resource estimate described herein and prepared in accordance with National Instrument 43-101 will be filed on SEDAR and EDGAR within 45 days from the date hereof.

Assays were performed by American Assay Laboratories of Sparks, Nevada, as directed under the supervision of Klondex staff. This organization is an ISO 17025 accredited independent laboratory.

Qualified Person
Scientific and technical information in this press release has been reviewed and approved by Mark Odell, P.Eng. (NV Lic#13708) of Practical Mining LLC, an "independent qualified person" within the meaning of National Instrument 43-101.

About Klondex Mines Ltd. (www.klondexmines.com)
Klondex is a junior-tier gold and silver mining company focused on exploration, development, and production in a safe, environmentally responsible, and cost-effective manner. The Company has 100% interests in four producing mineral properties: the Fire Creek Mine, the Midas Mine and ore milling facility, the Hollister Mine, all of which are located in the state of Nevada, USA, and the True North Mine and mill in Manitoba, Canada. The Company also has a 100% interest in the Aurora mine and ore milling facility, also located in Nevada, USA.

Cautionary Note Regarding Forward-looking Information
This news release contains certain information that may constitute forward-looking information or forward-looking statements under applicable Canadian and United States securities legislation (collectively, "forward-looking information"), including but not limited to the Company remaining focused on mining and further delineating high grade underground veins while looking for strategic alternatives to advance the open pit resource, the new information significantly extending Fire Creek's mine life, the exploration potential at the Fire Creek Mine, the timing of an updated mineral reserve and mineral resource update and future exploration and production plans of Klondex. This forward-looking information entails various risks and uncertainties that are based on current expectations, and actual results may differ materially from those contained in such information. These uncertainties and risks include, but are not limited to, the strength of the global economy; the price of gold; operational, funding and liquidity risks; the degree to which mineral resource estimates are reflective of actual mineral resources; the degree to which mineral reserve estimates are reflective of actual mineral reserves; the degree to which factors which would make a mineral deposit commercially viable are present; the risks and hazards associated with underground operations; and the ability of Klondex to fund its substantial capital requirements and operations. Risks and uncertainties about the Company's business are more fully discussed in the Company's disclosure materials filed with the securities regulatory authorities in Canada and United States available at www.sedar.com and www.sec.gov, respectively. Readers are urged to read these materials. Klondex assumes no obligation to update any forward-looking information or to update the reasons why actual results could differ from such information unless required by law.